This project has been made possible thanks to the international collaboration of paintings conservators Dr. Anna Bronzoni Catellani (Ateljé Catellani AB, Stockholm) and Dr. Roberta Lapucci (Techno-Rest-Art, Florence), diagnostic European centers and institutions such as University of Antwerp, Art-Test laboratory (Floren­ce), R&C Lab S.r.l. (Altavilla Vicentina) and Dr. Joris Dik (Delft University of Technology) and Dr. Irene Padovani (Conservation Scientist, Hamburg). An oil on canvas painting attributed to Rembrandt and representing a Portrait of a man, or Portrait as a young burgher, was fully investigated and restored, following a methodological approach which took into consideration: iconography, style, documentation, and technique. A diagnostic campaign was performed, in order to study and compare the materials and methods with those of Rembrandt and/or his pupils, assistants or cooperators. After the removal of the discolored varnish layer (fig.2), the conservation intervention unveiled the superb and transparent nuances of the original artist’s touch. It also revealed the magnificent depth and luminosity of the paint layer, that was previously hidden under a murky opacity which had caused a flattening of the richly modeled forms. Furthermore, the removal of a previous old lining uncovered hidden written information which was present on the reverse side of the stretcher, resulting useful for the reconstruction of the provenance of the picture. It also allowed the…